What kind of car should i buy?

The Acura TL is a great car with a great reputation. It also has a V6 which gives it some power advantage over either Audi you have listed. That said, the Audi A3 Quattro has one of the nicest rides on the road in its sedan segment. Its very sporty, has amazing handling capabilities, and great speed and acceleration for its power train. It is known for being one of the finer luxury sedans on the road. Now, after evaluating all relevant facts of each car, your first choice is also my first choice. I like that it has 27,000 less miles than the Acura, and is priced $900 less too. The Quattro is one of the best drive trains on the road, so I'd choose it over the FWD option you have listed third. You'd get a nice car with any of these three, but I'm in agreement with your choice here. I'd take the Audi A3 Quattro. Take it to a mechanic before you buy it just to check it out. Better to be safe than sorry. Good Luck!